Hellberg, C. (1979). A voice of the voiceless: The involvement of the Lutheran World Federation in Southern Africa 1947 - 1977. Studia missionalia Uppsaliensia.
芝加哥风格引文Hellberg, Carl-Johan. "A Voice of the Voiceless: The Involvement of the Lutheran World Federation in Southern Africa 1947 - 1977." Studia Missionalia Uppsaliensia 1979.
MLA引文Hellberg, Carl-Johan. "A Voice of the Voiceless: The Involvement of the Lutheran World Federation in Southern Africa 1947 - 1977." Studia Missionalia Uppsaliensia, 1979.
警告：这些引文格式不一定是100％准确.